Three required elements, legally enforceable contracts1) Offer and acceptance2) Exchange of consideration3) No defenses to enforcement(lack of defenses)4) Capacity5) legal Methods of formation1) Express contract2) Impiled- in-fact contract (ex. pay after doctor's service)3) Implied-in-law contract/Quasi-Contract - not a contract at all - a remedy to prevent unjust enrichment of the defendant..
